linux-kernel - [PATCH 2/3] f2fs: use shared inode lock during f2fs

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Date:   Thu, 16 Nov 2023 14:25:55 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <chao@...nel.org>
Subject: [PATCH 2/3] f2fs: use shared inode lock during f2fs_fiemap()

f2fs_fiemap() will only traverse metadata of inode, let's use shared
inode lock for it to avoid unnecessary race on inode lock.

Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/f2fs/data.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 4e42b5f24deb..42f0f6184f73 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1992,7 +1992,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	if (ret)
 		return ret;
 
-	inode_lock(inode);
+	inode_lock_shared(inode);
 
 	maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
 	if (start > maxbytes) {
@@ -2112,7 +2112,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	if (ret == 1)
 		ret = 0;
 
-	inode_unlock(inode);
+	inode_unlock_shared(inode);
 	return ret;
 }
 
-- 
2.40.1